Use two oneway binder interfaces instead. The interfaces post messages to handlers as was implemented before, but provide a more strictly defined interface, with less hops between NetworkAgent, AsyncChannel, and ConnectivityService. Test: atest FrameworksNetTests CtsNetTestCasesLatestSdk Merged-In: Ica51d0179bcb3b4e314d2c3e85709aead6ca5657 Change-Id: Ica51d0179bcb3b4e314d2c3e85709aead6ca5657